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| Fe-Al-Cr合金在含锌蒸汽的低氧压中预氧化后的表面形貌 |
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严靖钰1, 刘亚1,2, 吴长军1, 彭浩平1, 涂浩1, 苏旭平1,2
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1.常州大学 江苏省材料表面科学与技术重点实验室, 江苏 常州 213164;2.常州大学 江苏省光伏科学与工程协同创新中心, 江苏 常州 213164
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| 摘要: |
| 在900、950和1 000℃含Zn蒸汽的低氧压下对4种Fe-Al-Cr合金进行了预氧化实验，时间为1~5 h。Zn/ZnO粉末加热后提供的氧压在10-21~10-18 MPa之间。结果表明：经1 000℃预氧化1 h，Fe-1.2Al-2Cr合金表面的组织是ZnM2O4（M∶Al+Cr）+ZnO+α-Fe，Fe-2Al-3Cr及Fe-3Al-4Cr合金的表面组织是ZnM2O4+α-Fe，Fe-3Al-6Cr合金的组织是ZnM2O4+M2O3。合金中随Al、Cr元素少量的增加，表面氧化物增加，其中的Al含量快速增加；表面褶皱程度降低，突出的α-Fe相数量减少，向圆粒状转变。延长预氧化时间与提高预氧化温度都可以使表层的α-Fe相减少，氧化物面积增加。Zn在试样表面分布均匀，会渗入α-Fe相，会与表层的铝铬氧化物反应生成ZnM2O4相。 |
| 关键词: 预氧化 Fe-Al-Cr合金 氧化薄膜 |
| DOI：10.11933/j.issn.1007-9289.20180116002 |
| 分类号:TG174.444 |
| 基金项目:国家自然科学基金（51471037，51671036）；江苏省教育厅高等学校自然科学研究重大项目（17KJA430001）；江苏省“青蓝工程” |
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| Surface Morphology of Fe-Al-Cr Alloy Pre-oxidized Under Low Oxygen Pressure with Zinc Vapor |
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YAN Jing-yu1, LIU Ya1,2, WU Chang-jun1, PENG Hao-ping1, TU Hao1, SU Xu-ping1,2
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1.Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, Jiangsu;2.Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu
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| Abstract: |
| Pre-oxidation of four Fe-Al-Cr alloys under low oxygen pressures with zinc vapor at 900, 950 and 1 000℃ for 1 h to 5 h was performed. The samples were pre-oxidized in Zn/ZnO Rhines packs. The packs produce oxygen pressures from 10-21 MPa to 10-18 MPa. The results show that the phases formed on surface are ZnM2O4 (M:Al+Cr)+ZnO+α-Fe for Fe-1.2Al-2Cr alloy, ZnM2O4+α-Fe for Fe-2Al-3Cr and Fe-3Al-4Cr alloys, ZnM2O4+M2O3 for Fe-3Al-6Cr alloy after pre-oxidation at 1 000℃ for 1 h. With the increase of Al and Cr elements in the alloy, the surface oxides and the Al content in the oxides increase rapidly. Additionally, the degree of surface folds decrease and the number of prominent α-Fe phases decreases; α-Fe turns into a round granular. Extending the pre-oxidation time and raising the pre-oxidation temperature can both reduce the surface α-Fe phase and promoting the growth of oxides area. Zn uniformly distributing on the surface can dissolve in the α-Fe phase and react with the oxides of aluminum and chromium on the surface layer to form the ZnM2O4 spinel. |
| Key words: pre-oxidation Fe-Al-Cr alloy oxide film |